package a;
public class ShuZi {
int m;
public int getM() {
return m;
}
public void setM(int m) {
this.m = m;
}
public void shu()
{
System.out.println("输入的数字是:"+m);
if(m>99999)
{
System.out.println("The number is too large");
}
else if(m<0)
{
System.out.println("必须输入正整数");
}
else
{
System.out.println("m的位数为："+String.valueOf(m).length()+"位");
System.out.print("逆序打印数字：");
for(int i=String.valueOf(m).length()-1;i>=0;i--)
{
System.out.print(String.valueOf(m).substring(i,i+1));
}
}
}
public static void main(String[] args) {
ShuZi shu=new ShuZi();
shu.setM(3684);
shu.shu();
}
}
m的值无限制时
package a;
public class ShuZi {
String m;
public String getM() {
return m;
}
public void setM(String m) {
this.m = m;
}
public void shu()
{
System.out.println("输入的数字是:"+m);
if(m.substring(0,1).equals("-"))
{
System.out.println("必须是正整数");
}
else
{
System.out.println("数字的位数为："+m.length()+"位");
System.out.print("逆序打印数字：");
for(int i=m.length()-1;i>=0;i--)
{
System.out.print(m.substring(i,i+1));
}
}
}
public static void main(String[] args) {
ShuZi shu=new ShuZi();
shu.setM("325340069646798572422365125");
shu.shu();
}
}